Bench-stop.



L. B. ALLEN.

BENCH STOP.

APPLIQATION nun MAY 3, 1912.

1,070,938, PatentedAug. 19, 1913. v

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ATTORNEY COLUMBIA PLANOGRAPH C0,, WASHINGTON, n. c.

LEWIS B. ALLEN, OF BOSTON, MASSACHUSETTS.

BENCH-STOP.

Specification of Letters Patent.

Patented Aug. 19,1913.

Application filed. May 8, 1912. Serial No. 695,903.

To all whom it may concern:

Be it known that I, LEWIS B. ALLEN, a citizen of the Dominion of Canada,residing at Boston, in the county of Suffolk and State of Massachusetts,(whose post-office address is 212 Pleasant street, Boston,Massachusetts,) have invented certain new and useful Improvements inBench-Stops, of which the following is a specification.

My invention relates to the mechanism used upon the work benches ofcarpenters, j oiners, pattern makers, cabinet makers, wood carvers,etc., for holding firmly pieces of wood of various sizes and forms sothat they may be conveniently worked upon by planes, chisels and similartools.

My invention consists of a forward stop, commonly called a bench stop, ahorizontal back stop for the top of the bench, and a side stop for thefront edge of the bench.

My objects are, first, to provide an easily adjusted and readily lookedforward stop that when adjusted will be absolutely rigid in resistin anypressure that may be brought to%)ear upon it in the use of ordinarytools; second, to provide a horizontal back stop capable of securelyholding the rear end of a piece of lumber to he worked upon when lyingflat upon the work bench; and third, to provide a back stop for thefront edge of the bench, capable of securely holding a piece of lumberplaced on edge, at the front of the work bench, its forward end restingagainst any ordinary stop projecting from the front edge of the workbench. I accomplish these objects by means of the mechanism illustratedin the accompanying drawing, in which Figure 1 is a side elevation of mydevice; Fig. 2 is a cross section on the line mm, showing theconstruction of the back stop; Fig. 3 is a top view of the supportingcase of the forward stop; Fig. 4 is a top view of the forward stopproper; Fig. 5 is a plan and Fig. 6 an edge view of the holding cam forthe forward stop; Fig. 7 is a plan and Fig. 8 an edge view of a modifiedholding cam for the forward stop; Fig. 9 is a plan, and Fig. 10 an edgeview of the back stop lever.

Similar letters refer to similar parts in the several views.

Referring to Figs. 1 and 2, A is a portion of an ordinary work bench,having a groove a along its front edge, and being provided with avertical forward stop B, of any ordinary construction, fixed to thefront edge of said bench.

My device for a forward stop consists of a cylindrical metal holder Cpassing down through the bench top at an angle, preferably of 45-degrees. It is secured in place by the screw 0. Through this holder is asemi-circular hole adapted to receive the forward stop D of similarform; while I prefer this form of cross section it may be of some otherform equally rigid. The up per end of this stop is cut at such an anglethat when in place its upper surface will be parallel to the bench top.The shar edge thus formed is provided with teeth as shown at cl. I

The stop D may be adjusted to any, desired height above the bench topand firmly secured by the lever E, pivoted by the rivet c. This levermay be made in either of two forms shown. First, as in Figs. 5 and 6, inwhich the depression 1) provides a friction surface which holds it inposit-ion for securing the stop D, as shown in Fig. 1. The second formis shown in Figs. 7 and 8, in which the circular portion is formed intoa side cam as shown at f for the purpose of providing sufiicientpressure on the stop D. In. either case the lower end of this lever isbent at right angles, as shown at g for the purpose of preventing thestop D from dropping out when the pressure of the lever E is released.

My device for a combined back stop on the top and front of the benchconsists of an angle plate F whose horizontal part projects into thegroove on of the bench top, which is the preferable form, although ifthe bench top projects in front, over the bench frame, the angle platemay project back under the bench top, and the groove will not benecessary. Outside of this is the angle plate Gr. These two angle platesare secured to each other by the rivet h which also forms the pivot forthe eccentric lever H. This lever has a circular boss formed upon itwhich fits into a hole in the angle plate G, the pivot h passingeccentrically through this boss, forming an eccentric by means of whichthe angle plates F and G may be drawn together, thus providing means forclamping the back stop device at any desired point along the length ofthe work bench A. The eccentric lever H is shown in Fig. 1 in itsclamped posit-ion. Its position when released is shown in dotted lines.Upon the top of the angle plate G is pivoted the back stop lever J bythe rivet Z. Upon its front end is formed the knife-edged eccentricportion j adapted to cut into the end of a piece of lumber K as at 7',Fig. 1, and hold the same firmly against the forward stop D. The lever Jis formed with a slight offset so as to carry the upturned thumbextensions below its general level. The toothed portion m of the lever Jextends beyond the front line of the bench top and is adapted to hold apiece of lumber whose forward end is placed against the stop B, andwhose rear end is engaged by the toothed portion forced into it byswinging the free end of the lever J to the front. A piece of lumber L,secured in this manner is shown in dotted lines in Fig. 1.

The usual forms of forward bench stops has been such that theyfrequently became loosened and the toothed points forced upward by thepressure against them, thereby endangering the cutters of the workmansplanes. Proper means have not been provided for conveniently adjustingthem as to height, or securing them in the desired position.

In my device some of the important advantages are these: First, theforward stop standing at a sharp angle, and supported by a castingrigidly fixed in the bench top, provides a very substantial and rigidstop for all purposes for which it is needed. Second, a piece of lumberhowever thin, lying flat upon the bench, may be securely held by theforward and back stops. Third, a piece of lumber may be as securely heldon edge as though lying fiat on the bench.

Having described my invention I claim In a back stop for woodworkersbenches the combination of a clamp consisting of a top and bottom rightangle plate and an eccentric lever adapted to fix said clamp at anypoint along the front of said bench, and a horizontal lever pivoted tosaid top plate and having on its front end a knife edged eccentricportion whose highest part is at one side of the center, and a toothedportion lying wholly on the opposite side of the center, substantiallyas and for the purposes described.

LEW'IS 13. ALLEN. WVitnesses OSCAR E. PERRIGO, HILDA A. LUNDBERG.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

